Pump-operating mechanism.



A. MOSER.

PUMP OPERATING MECHANISM.

APPLICATION FILED MABUQ, 1914.

1,1 1 3,235, Patented Oct. 13, 1914.

THE NORRIS PETERS C0, F'HOTU-I.ITHO., WASHINGTON n, c

ANDREW MOSER, OF HICKMAN, NEBRASKA.

PUMP-OPERATING MECHANISM.

Specification of Letters Patent.

Patented Oct. 13, 1914..

Application filed March 9, 1914. Serial No. 823,428.

To all whom it may concern:

Be it known that I, ANDREW MosnR, a citizen of the United States, residing at Hickman, in the county of Lancaster and State of Nebraska, have invented certain new and useful Improvements in Pump- Operating Mechanism, of which the foll0wing is a specification. I

The mechanism which is the subject matter of the present application for patent is designed more particularly for operating duplex pumps, a pair of pump cylinders being provided, the plungers of which are operated by a single recipro'catory driving element through the intermediary of a novel transmission mechanism.

It is the object of the invention to provide a transmission mechanism which is extremely simple in construction, and highly etlicient in operation, and to this end it consists in a combination and arrangement of parts to be hereinafter described I and claimed, reference being had to the accompanying drawing, in which Figure 1 is an elevation of the mechanism, and Fig. 2 is a cross-section on the line 2-2 of Fig. 1.

Referring specifically to the drawing, 5 denotes two opposite pump-cylinderswhich are located on opposite sides of the longitudinal center line of a fluid pressure cylinder 6, in which latter works a piston 7 having.

a rod 8 to the outer end of which is connected a wedge-shaped member 9 having racks 10 on opposite sides. The member 9 has the shape of an isosceles triangle, the rack being on the two equal sides and the rod 8 being connected to the base, which latter is' thus opposite the end of the cylinder from which the rod extends. The vertex of the triangle points in the direction the pump cylinders 5 are spaced from the cylinder 6, and a perpendicular drawn from the vertex to the base of the triangle coincides with the central longitudinal axis j of the latter cylinder. Thus the racks 10 are located on opposite sides of said axis, and they converge in the direction the cylinders 5 are spaced from the cylinder 6, or in the direction of the forward travel of the piston rod 8. The pump cylinders 5 have side trunnions 11 journaled in suitable bearings 12, the arrangement being such that said cylinders are mounted for oscillatory movement in planes parallel to the plane in which the reciprocatory member 9 travels. Each pump-cylinder containsa plunger 13, the rod 11 of which carries at its outer end a supportfor a free-running pinion or gear wheel 15. These pinions are on opposite sides of themember 9 and in mesh withthe respective racks 10 thereof. Each. pinion is also in mesh with a stationary rack 16, the

, pinion being located between said stationary rack and the traveling racklO. The racks 16 extend at an oblique angle to the longitudinal axis of the cylinder 6 and the member 9, and they are located on opposite sides of thelatter. Thus the racks 10 and 16 are inclined in opposite directions to the line of travel of the member 9.

At the beginning of the forward stroke which time the pinions are at the highest;

point of the racks 10. The inclinationof the racks 16 is such that the pinionsremain in mesh therewith during their entire travel along the racks 10; At the beginning ofxthe stroke the pinions are at the lower ends of they have traveled to the upper ends thereof. On the return stroke of the piston 7, the pinions travel down the racks 10 and 16, whereupon the cylinders 5 swinggback to their oblique position and the plungers 13 make the return stroke,

To the outer end of the member is connected a double rack 17. 'Two loose pinions 18 on a shaft 19 are in mesh with the the racks 16,'and at the end of'the stroke,

respective racks, and a reverse pawl-andratchet mechanism transmits the rotary motion of the pinions to the shaft 19, the shaft turning in one direction. This mechanism is a well-known crank substitute and a further descriptionthereof is deemed unnecessary. On the shaft 19 is a fly wheel 20, and said shaft is also belted or otherwiseoperatively connected to a governor 21 controlling the fluid pressure supply to the cylinder 6.

At 22 is shown the valve chest of the cylinder 6 in which a valve (not shown) operl thereof, and stationary racks in mesh with ates, said valve being actuated from the member 9, the latter having an apertured lug or abutment 23 through which passes a rod 24 connected at one end to a lever 25 fulcrumed on a bracket 26 carried by one of the heads of the cylinder 6. A valve rod 27 is connected to the lever On the rod 2-1 are spaced set collars 28 located respectively on opposite sides of the abutment 23.

It will be evident from the foregoing that when the member 9 is in motion, the abutment 23 strikesthe set collars 28, first one and then the other, whereby the rod 24 is reciprocated, and through the lever :25, the valve to which the rod 27 is connected, is operated.

The pump-cylinders 5 may be used for pumping air, water or any other fluids, and they will be equipped with the usual inlet and outlet valves, which need not be described in detail as they form no part of the present invention. It is also to be understood that various changes and modifications in such structural details as have been illustrated may be made without departure from the scope of the invention as claimed hereinafter. The invention is also not limited in its application to the operation of pumps, but may be applied with equal facility to other machinery.

I claim:

1. The combination with a pair of oscillatory cylinders located opposite each other and containing each a plunger having a rod; of a pinion carried by the plunger rod of each cylinder, a reciprocatory member having converging racks on opposite sides in mesh respectively with the pinions on one side thereof, and stationary racks in mesh with the other sides of the pinions.

. 2. The combination with a pair of oscillatory cylinders located opposite each other and containing each a plunger having a rod; of a pinion carried by the plunger rod of each cylinder, a reciprocatory wedge-shaped member working between the cylinders and havingracks on opposite sides in mesh re spectively with the pinions on one side the other sides of the pinions.

3. The combination with a pair of oscillatory cylinders located opposite each other and containing each a plunger having a rod; of a pinion carried by the plunger rod of each cylinder, a reciprocatory member having racks on opposite sides in mesh respec tively with the pinions on one side thereof, said racks being inclined at an oblique angle to the line of travel of the reciprocatory member and converging, and stationary racks in mesh with the other sides of the pinions.

ft. The combination with a pair of oscillatory cylinders located opposite each other and containing each a plunger having a rod; of a pinion carried by the plunger rod of each cylinder, a reciprocatory member having racks on opposite sides which are inclined, in opposite directions, to the line of travel of said member, and said racks being in mesh respectively with the pinions on one side, and stationary racks in mesh with the other sides of the pinions, said stationary racks being inclined to the line of travel of the reciprocatory member in a direction opposite the direction of incline of the firstmentioned racks.

5. The combination with an oscillatory cylinder containing a plunger having a rod; of a pinion carried by the plunger-rod, a reciprocatory member having a rack in mesh with the pinion on one side thereof and in clined to the line of travel of the member, and a stationary rack in mesh with the other side of the pinion, said stationary rack being inclined to the line of travel of the reciproca'tory member in a direction opposite the direction of incline of the first-mentioned rack.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN SLOTE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Wuhington, D. G." 

